How does this bubble system work exactly? I mean, if it was effective, there would most likely not be an outbreak. Or did they only go into the bubble after some positive tests were found? Do they enter a bubble after testing to prevent being infected after the test was administered? If so, that makes sense, otherwise it's just a craps shoot if you will. I question the entire setup. Not just at United but everywhere. Seemingly the youth players that are training with the first team present the highest risk of cross infection. You would imagine the youth players are more likely to be "out" with friends in more risky situations and can bring it back to others.
re the vaccine, it won't help players not get infected. That's not the point. The point is to not die or wind up in hospital. I don't see much change until a player dies or becomes very sick requiring hospital stay.